Issues
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BRIEF REVIEWS
Regulatory B Cells in Autoimmune Diabetes
ALLERGY AND OTHER HYPERSENSITIVITIES
Targeting In Vivo Metabolic Vulnerabilities of Th2 and Th17 Cells Reduces Airway Inflammation
T cells show elevated markers of metabolic capacity in lung inflammation in vivo.
IL-17–producing T cells show the most pronounced expression of metabolic markers.
Glut1 and GLS inhibitors reduce cytokine production and enhance steroid therapy.
ANTIGEN RECOGNITION AND RESPONSES
C-Type Lectin Maintains the Homeostasis of Intestinal Microbiota and Mediates Biofilm Formation by Intestinal Bacteria in Shrimp
CTL33 maintains intestinal microbiota homeostasis in shrimp.
CTL33 mediates biofilm formation of intestinal bacteria.
CTL33 facilitates the establishment of intestinal bacteria in shrimp intestines.
AUTOIMMUNITY
A Functionally Distinct CXCR3+/IFN-γ+/IL-10+ Subset Defines Disease-Suppressive Myelin-Specific CD8 T Cells
Autoregulatory CD8 T cells contain a CXCR3+/IFN-γ+/IL-10+ subset.
CXCR3+ CNS-specific CD8 T cells can suppress EAE.
IMMUNE REGULATION
Helicobacter pylori CagA Interacts with SHP-1 to Suppress the Immune Response by Targeting TRAF6 for K63-Linked Ubiquitination
CagA suppressed expression of proinflammatory cytokines in vitro and in vivo.
CagA interacted with SHP-1 which facilitated the recruitment of SHP-1 to TRAF6.
CagA interacts with SHP-1 to inhibit the K63-linked polyubiquitination of TRAF6.
NK Cell–Derived IL-10 Supports Host Survival during Sepsis
NK cells produce IL-10 during sepsis in an IL-15–dependent manner.
NK cell–derived IL-10 promotes host survival during sepsis.
NK cell–derived IL-10 is relevant to septic patients.
Functional Analysis of Immune Signature Genes in Th1* Memory Cells Links ISOC1 and Pyrimidine Metabolism to IFN-γ and IL-17 Production
Functional analysis of Th1* immune signature genes uncovers novel regulators of IFN-γ and IL-17.
Loss of ISOC1 impairs CD4+ T cell pyrimidine metabolism, bioenergetics, and cytokine production.
IgG Epitopes Processed and Presented by IgG+ B Cells Induce Suppression by Human Thymic-Derived Regulatory T Cells
IgG1 Fc peptides activate natural Treg, which regulate naive T cell differentiation.
Ag processing of the surface IgG on B cells activates Treg.
Blockade of PD-1/PD-L1 Pathway Enhances the Antigen-Presenting Capacity of Fibrocytes
Fibrocytes enable CD8+ T cell activation mainly via CD86/CD28 costimulation.
Fibrocytes express functional PD-L1; PD-L1 blockade further activates CD8+ T cells.
Tumor-infiltrating fibrocytes have APC function enhanced by PD-1/PD-L1 blockade.
IMMUNE SYSTEM DEVELOPMENT
Evidence for Prescribed NK Cell Ly-49 Developmental Pathways in Mice
NK cells with unique receptor repertoires predominate at iNK, tNK, and mNK stages.
High interdependencies of NK cell receptor expression at the iNK stage were found.
In MHC-I–deficient mice, activating Ly-49 receptor expression is underrepresented.
FATC Domain Deletion Compromises ATM Protein Stability, Blocks Lymphocyte Development, and Promotes Lymphomagenesis
The FATC domain is critical for ATM protein stability in vivo.
R3047X mutation in ATM FATC domain blocks lymphocyte development.
ATM-R3047X has compromised tumor suppression functions.
INFECTIOUS DISEASE AND HOST RESPONSE
T Cells Specific for a Mycobacterial Glycolipid Expand after Intravenous Bacillus Calmette–Guérin Vaccination
We developed Macaca mulatta (Mamu) CD1b-GMM and CD1c-GMM tetramers.
i.v. BCG leads to expansion of CD1c-GMM–specific T cells in the blood.
Some CD1c-GMM–specific T cells express a TRM phenotype in BAL.
Semaphorin 3E Protects against Chlamydial Infection by Modulating Dendritic Cell Functions
Semaphorin 3E protects against chlamydial lung infection.
Semaphorin 3E modulates DC and T cell function for effective immune response.
Virus Control in Vaccinated Rhesus Macaques Is Associated with Neutralizing and Capturing Antibodies against the SHIV Challenge Virus but Not with V1V2 Vaccine–Induced Anti-V2 Antibodies Alone
Vaccines were designed to induce only V1V2 Abs in NHP before SHIV challenge.
Vaccine-induced V2 Abs did not independently control SHIV infection.
Neutralizing and virus capture anti-Env Abs correlated with SHIV virus control.
Accelerated Clearance and Degradation of Cell-Free HIV by Neutralizing Antibodies Occurs via FcγRIIb on Liver Sinusoidal Endothelial Cells by Endocytosis
Neutralizing Ab-opsonized HIV was cleared faster from blood circulation than HIV.
FcγRIIb, the lone FcγR expressed in human LSEC, clears Ab-HIV via endocytosis.
Endocytosed Ab-HIV localizes to lysosomes of LSEC.
INNATE IMMUNITY AND INFLAMMATION
TLR3-Activated Monocyte-Derived Dendritic Cells Trigger Progression from Acute Viral Infection to Chronic Disease in the Lung
Activation of TLR3+ moDCs predominates after respiratory viral infection.
TLR3 and moDCs are required for progressive postviral lung disease.
TLR3+ moDCs expand lung epithelial cells that are key to postviral disease.
TSLP-Driven Chromatin Remodeling and Trained Systemic Immunity after Neonatal Respiratory Viral Infection
Early-life RSV infection persistently alters the immune phenotype in BMDC.
TSLP has a role in the altered immune environment by inhibiting type 1 immunity.
RSV infection alters immune responses through epigenetic/transcriptional programs.
cAbl Kinase Regulates Inflammasome Activation and Pyroptosis via ASC Phosphorylation
Tyrosine kinase inhibitors that target cAbl kinase inhibit inflammasome activation.
cAbl kinase deletion suppresses the ability to activate the NLRP3 inflammasome.
Tyrosine 146 of ASC is integral to speck formation and inflammasome function.
Broad-Spectrum Robust Direct Bactericidal Activity of Fish IFNφ1 Reveals an Antimicrobial Peptide–like Function for Type I IFNs in Vertebrates
Teleost IFNφ1 was discovered as a broad powerful bactericidal cytokine.
IFNφ1 directly kills bacteria by cytoderm binding and disruption.
Potent antimicrobial peptide–like IFN-Is were identified in other gnathostomes.
MUCOSAL IMMUNOLOGY
AT-RvD1 Mitigates Secondhand Smoke–Exacerbated Pulmonary Inflammation and Restores Secondhand Smoke–Suppressed Antibacterial Immunity
SPM AT-RvD1 diminishes SHS-exacerbated, infection-induced pulmonary inflammation.
SHS-exposed mice demonstrated augmented antibacterial immunity when treated with AT-RvD1.
AT-RvD1–treated, SHS-exposed, vaccinated mice rapidly clear acute bacterial challenge.
SYSTEMS IMMUNOLOGY
Conserved IFN Signature between Adult and Pediatric Eosinophilic Esophagitis
An IFN gene signature is present in the inflamed mucosa of individuals with EoE.
This IFN signature is conserved between adults and children.
IFN-γ is produced by circulating EoE T cells activated with EoE-causal allergens.
TUMOR IMMUNOLOGY
CD40 Agonist Overcomes T Cell Exhaustion Induced by Chronic Myeloid Cell IL-27 Production in a Pancreatic Cancer Preclinical Model
Intratumoral T cells lose IFN-γ and GzmB and express elevated Tox and IL-10.
Agonistic αCD40 abrogates intratumoral IL-27, IL-10, and TEX.
αCD40+αPD-L1 and abrogating Tnfrsf1a on host cells promotes tumor clearance.
Aryl Hydrocarbon Receptor Signaling Controls CD155 Expression on Macrophages and Mediates Tumor Immunosuppression
CD155 is induced on macrophages in response to stimulation by IL-4 and LPS.
CD155 induction is dependent upon persistently active AhR.
CD155 can be targeted in vivo via AhR inhibition.
Asah2 Represses the p53–Hmox1 Axis to Protect Myeloid-Derived Suppressor Cells from Ferroptosis
ASAH2 is overexpressed in MDSCs in human colon cancer patients.
The Slc5a11–GSH–GPX4–lipid ROS ferroptosis pathway is regulated by Asah2 in MDSCs.
Inhibition of Asah2 by NC06 suppresses MDSC accumulation in tumor-bearing mice.
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Cover Image
Cover Image
On the cover: The scanning electron microscopic image of liver sinusoidal endothelial cells (LSEC) enriched by immunomagnetic separation, showing fenestrae, a gold standard morphologic feature that distinguishes LSEC from other cells of the liver. Turman, J. M., A. M. Cheplowitz, C. Tiwari, T. Thomas, D. Joshi, M. Bhat, Q. Wu, E. Pong, S. Y. Chu, D. E. Szymkowski, A. Sharma, S. Seveau, J. M. Robinson, J. J. Kwiek, D. Burton, M. V. S. Rajaram, J. Kim, L. Hangartner, and L. P. Ganesan. 2021. Accelerated clearance and degradation of cell-free HIV by neutralizing antibodies occurs via FcγRIIb on liver sinusoidal endothelial cells by endocytosis. J. Immunol. 206: 1284–1296.
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